Custom Merch for Gyms in San Francisco, CA
Merch Mob makes member tees, coach and staff apparel, and challenge and competition shirts for gyms in San Francisco, CA, at its shop in Montclair, CA, and ships them to San Francisco. The 18 to 34 age group is 27% of San Francisco, a few points over the national 23% and against 24% across California (Census ACS, 2020-2024), so give training cuts a little more room than a typical gym would.
San Francisco by the numbers
San Francisco has 826,079 residents, 6% fewer than in 2020 (Census estimates).
San Francisco County has 173 fitness and recreational sports centers with paid employees (Census County Business Patterns, 2023). That is 2.1 for every 10,000 residents, above the national figure of 1.2. 50% of them employ fewer than 10 people; the rest are larger operations. The count is up 7% from 162 in 2018.
That Census category covers gyms and studios along with other recreational sports facilities.
San Francisco County has one fitness or recreational sports center for every 4,780 residents. Of the 60 counties behind these pages for gyms, San Francisco County has the 4th-most fitness and recreational sports centers per resident.
- Population, 2025
- 826,079
- Since 2020
- −6%
- County
- San Francisco County
- Fitness and recreational sports centers in San Francisco County, 2023
- 173
- Per 10,000 county residents
- 2.1 (US 1.2)
- Time zone
- Pacific
- Median age
- 40.0 (US 38.9)
- Residents aged 18 to 34
- 27% (US 23%)
- Warmest month, average high
- September, 70°F
- Coldest month, average low
- January, 47°F
- Days at 90°F or hotter, a year
- 3
- Nights at 32°F or colder, a year
- 0
- Rain, a year
- 23 in
- USPS zone from the shop
- 4
Weather: San Francisco Downtown station, 1 mi from San Francisco's center (NOAA 1991-2020 Climate Normals). People: Census ACS 2020-2024. Counts: CBP 2023, by county, paid-employee establishments. Population: Census, July 2025.
What San Francisco's weather means for gyms
Highs reach 70°F only from September to October, so for most of the year the training shirt in San Francisco is a long sleeve, or a tee under a light layer. Freezing nights are rare and January lows average 47°F, so a midweight hoodie or quarter-zip covers every season and heavyweight fleece is seldom needed. December is the wettest month, at about 4.8 inches, which can push outdoor training indoors and suits an indoor-class tee release.
| Month in San Francisco | Average high | Average low | Rain (in) | What members train in |
|---|---|---|---|---|
| January | 58°F | 47°F | 4.4 | Long sleeves and hoodies |
| February | 60°F | 48°F | 4.4 | Long sleeves and hoodies |
| March | 62°F | 49°F | 3.2 | Long sleeves and hoodies |
| April | 63°F | 50°F | 1.6 | Long sleeves and hoodies |
| May | 64°F | 51°F | 0.7 | Long sleeves and hoodies |
| June | 67°F | 53°F | 0.2 | Tees and light quarter-zips |
| July | 66°F | 54°F | 0 | Tees and light quarter-zips |
| August | 68°F | 56°F | 0.1 | Tees and light quarter-zips |
| September | 70°F | 56°F | 0.1 | Member tees and tanks |
| October | 70°F | 54°F | 0.9 | Member tees and tanks |
| November | 64°F | 51°F | 2.6 | Long sleeves and hoodies |
| December | 58°F | 47°F | 4.8 | Long sleeves and hoodies |
Made in So Cal, shipped to San Francisco.
Orders ship to San Francisco from the shop; there is no office or pickup point in California.
San Francisco is about 368 miles from Merch Mob's shop in Montclair, CA, a straight-line distance. From the shop's ZIP code, San Francisco is USPS zone 4. San Francisco shares the shop's Pacific time zone.
From the production floor
Merch Mob production in Southern California.
Ordering from San Francisco
When should a gym in San Francisco stock hoodies?
Nearly year-round. Tank weather in San Francisco is limited to September to October, and average highs sit under 65°F from November to May, so hoodies and quarter-zips are core stock and tanks are a small order for the few warm weeks.
More for San Francisco
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